Carbureter for gas-engines.



No. 784,676. PATENTED MAR. 14, 1905.

J. P. & M. HILTSGHER. GARBURETER FOR GAS ENGINES.

APPLICATION FILED AUG. 6, 1903.

UNITED STATES Patented March 14, 1905.

PATENT OFFICE.

CARBURETER FOR GAS-ENGINES.

SPECIFICATION forming part of Letters Patent No. 784,676, dated March 14, 1905.

Application filed August 6, 1903. Serial No. 168,476.

' for Gas-Engines, of which the following is a specification.

Our invention relates particularly to means to heat the liquid fuel fed to the carbureter of a gas-engine and to muflie the exhaust; and the object thereof is to provide simple and eflicient means to vaporize the liquid fuel fed to gas-engines, and thereby increase their efficiency and effect economy in the use of fuel and to deaden the sound of the exhaust. We accomplish this object by means of the device described herein, and shown in the accompanying drawings, in which-- Figure 1 is a central longitudinal section of a carburetor embodying our invention attached to a cylinder, partly broken away, of a gas-engine, parts being shown in elevation. Fig. 2 is a cross-section of the carburetor, taken on line 2 2 of Fig. 1.

In the drawings, A is a cylinder, and B is the piston of a gas-engine to which our carbureter is attached by the exhaust-pipe G, extending from the head of the cylinder to the head of the carbureter. This carbureter D is shown in central longitudinal section in Fig. 1 and in transverse section in Fig. 2. It consists of the outer casing E, which surrounds the air-heating chamber F. This chamber is in open communication with the gas-chamber G through pipe H and with the outer air by the air and drain pipe I, by means of which refuse matter fed into the top of the hot-air chamber through the drain-pipe X from the gas-chamber and not having turned to gas may be removed and through which the air may enter therein. This air-heating chamber F is separated from the exhaust-chamber Q, by the cylindrical casing J Centrally disposed in this casing J is the cylindrical vaporizingchamber L, extending from the exhaust-pipe C to the carbureting-chamber K. On the fuel-su ppl y pipe N we have placed the strainer O, through which the liquid fuel must pass on its way to the vaporizer from the storagetank,(notshown,) wherebyany solid substance not likely to be volatilized may be intercepted. Below this strainer and on the pipe N is disposed the observation-port P, by means of which the amount of fuel being fed to the carbureter may be observed and the amount of fuel being fed may be regulated by the feedregulating valve M.

The exhaust product passes directly into the exhaust-chamber Q through the exhaustpipe C. This chamber is divided into a number of coi'npartments by a series of radiallyprojecting flanges R on the central cylindrical casing S, surrounding the vaporizing-chamber L; but all these compartments are in open communication one with the other, as shown. The purpose of these radiallyprojecting flanges is to heat the cylindrical vaporizer L and vaporize the fluid discharged thereinto through the feed-pipe N and keep the same in heated condition. Disposed between these flanges in this chamber Q, is the exhaust-pipe T, leading from the rear end of this chamber, as at T, to the open outer air. The exhaust product passing through the exhaust-pipe C will enter the chamber Q between the flanges and pass out through the exhaust-flue T. The carbureting-chamber K communicates with the gas-chamber G atthe top and with the open airat the bottom, as at K. This car bureting-chamber discharges commingled'air and gas into the gas-chamber Or, from which the carbureted air or gas will pass into the head end of the engine-cylinder upon the suctionstroke of the piston through the pipe V and be entrapped therein upon the compressionstroke of the piston, (check-valve V having been disposed on the pipe V, leading from the gas-chamber G to the head of the cylinder.) The exhaust-valve \V is automatically operated by mechanism not shown, nor has the sparking mechanism which explodes the compressed gas in the head of the cylinder been shown, as these elements are no part of our invention.

To remove the products which may condense in the bottom of the gas-chamber G by reason of overfeeding the carbureter or in consequence of the use of lo\\ '-grade fuel, we have provided the drain-pipe X, which leads direetly into the hot-air chamber, where this product is partly vaporized and returned to the gas-chamber through the pipe H, and any portion not vaporized will pass down and out through the air and drain pipe I. o have provided an opening in the wall of the vaporizing-chamber opposite the end of the vaporizing-chamber, through which access may be obtained to the vaporizing-chamber for cleaning purposes. This opening is closed by the cap Y. In the operation of the engine the exhaust-heat will be utilized to vaporize the fuel fed into the carbureter, and at the same time this carburetor performs the functions of a muffler to silence the report of the exhaust.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. Means to carburet air for use in gas-engines comprising a central vaporizing-chamber closed at one end and open at the other; a fuel-supply port in the closed end communicating with a fuel-supply; radial flanges projecting from the casing of the vaporizingchamber into an exhaust-chamber; an exhaustohamber communicating with the exhaust of the engine at one end and with the exhaustflue at the other end; an air-heating chamber surrounding the exhaust-chamber, the said air-chamber having communication on the bottom thereof with the open air and having communication at the top with the gas-chamher, a gas-chamber having communication at its top with the end of the engine-cylinder and at the bottom with a carbureting-ehamber; a carburcting-chamber in the end of the carbureter, the said chamber being in open communication with the outer air on the lower part thereof and with the gas-chamber at the upper part, the vaporizing-chamber discharging directly into the carbureting-chamber, substantially as herein shown and described.

2. The combination in a carburetor of the central cylindrical chamber L having radial flanges R on the casing S thereof, an exhaustchamber Q surrounding the vaporizing-chamber, the exhaust-chamber being in communication at one end with the exhaust of the engine and the other end communicating with the exhaust-flue T leading to the outer air; an annular air-hea ting chamber surrounding the exhaust-chamber and having on its bottom the air and drain port I and communicating on its upper end with the top of the gas-chamber Gr, the said air-heating chamber having communication with the lower part of the gaschamber G substantially as herein shown and described.

3. Means to carburet air and silence the report of the exhaust of a gas-engine, comprising a cylindrical vaporizing-chamber, closed at one end and having an open discharge at the other end into and a carbureting-chamber, the said vaporiZing-chamber being in communication at its closed ends with the liquidfuel supply an exhaust-chamber surrounding the vaporizingchamber, the said exhaustchamber communicating at one end with the exhaust of the engine and the other end of the exhaust-chamber communicating with an exhaust-Hue leading from the closed end of the exhaust-chamber into the outer air; an annular air-heating chamber surrounding said exhaust-chamber, said air-heating chamber be ing provided at its lowermost side with the air and drain pipe and the uppermost side communicating with the gas-chamber; a gaschambcr having comm unieations at its bottom with the carbureting-chamber and its top with the end of the cylindersubstantially as herein shown and described.

In witness that we claim the foregoing We have hereunto subscribed our names this 30th day of July, 1903.

JOHN F. HILTSUHER. MAX HILTSCHER.

\Vitnesses:

Geo. B. ORONER, HERMAN LUDEWIG. 

